Anthraquinone vat dye.



T all whom 1' t may concern UNITED s'rATn-s rEavr canton.

WILHELM'HERZBERG AND WALTER BRUCK, OF SCHbNEBERG, NEAR BERLIN; GER-- MANY, ASSIGNORS T0 ACTIEN GESELLSCHAFT FUR ANILIN FABRIKATION, 035

BERLIN, GERMANY.

No Drawing.

Beit known that we, lVILI-IELM Hnnz- ISBERG and Wanna: BRUCK, subjects of the Emperor of Germany, residing at Schonebcrg, near Berlin, Germany, our post-office addresses being Landshuterstrasse 24 and Neue Culmstrasse 5 Schbneberg, near Ben 'lin, Germany, respectively, have invent-ed certain new and useful Improvements in New Anthraquinone Vat Dyes, of which'the following is a specification.

In our application serially numbered 600,111 and filed December th, 1910 we have described and clainied brominated anthraquinone a cridones. Now we have found that such a brominated anthraquinone acridone if condensed with an aminoanthraquinone or-a derivative of an aminoanthraquinone yields very valuable vat dyes which are fast to washing, to chlorin and to light.

The tints'obtained with these dyes vary from deepbrfiwn to red-brown or Corinth.

. The new dyes produced according to the foregoing invention may also be obtained in a quite (lllfGYPnt way winch is as follows: By condensing ahalogenlzed anthraquinone,

and more especially alpha:chloroanthraquinone, with a bromo derivative of anthrairilic acid a bromoanthraquinony lanthranilic' acid is obtained; now by condensing such a broom derivative with an 'aminoanthra uinone or a suitable derivative of an mninoanthiaquinone an anthraquinonylaminoanthraquinonylanthranilic acid results which by the action of a suitable condensing agent converted into the corresponding anthraquii1onylaminophenanthraquinone acridone representing the new vat dyes being the ob ject of our invention.

The following example serves to illustrat our invention, the parts being byweight: 4-.O.5 parts of bronioanthraquinone-acridone. obtained by acting wit bromin upon an thraquinonyl-l.Q-acridone, and 22.3 parts of alpha-aminoanthraquinone are dissolved in about 700 parts of nitrobenzene' and this solution added with 10.6 parts of sodium Specification of Letters Patent.

an alkaline hydrosultiie Ul ANTI-IBAQUiNONE VAT DYE.

v Patented Jan. 21, 1913.

Application filed May 8, 1911. Serial No. 625,760.

carbonate and about 1 part of copper powder. The mass is then heated to theboil during, about 20 hours, the. red solution changing gradually to red-violet. The reaction being finished the mass is distilled with steam in order to eliminate the nitrohenzene,

whereby the new vat dye is obtained in the shapeof a dark powder which may be purified by extracting it with boiling glacial acetic acid. The new dye is thus obtained in the dry state when pulverized as a dark violet powder which is insoluble in alcohol, benzene, glacial acetic acid, pyridin and chlorobenzene. I dissolves in nitrobcmene to a bluerre d solution and n concentrated sulfuric acid to a yellow solution, from which solution on the addition of ice violet flakes are separated.

In fuming sulfuric acid containin 25% of S0,, the new dye dis solves to a green solution.

red vat from which cotton. witl'iout a inordant dved blackish tints which on ilg'lijg turn to a Corinth shade.

It is obvious to lhosc fililllCl l. in the art that our present invention is not limited to the foregoing" example or to the details given therein. Thus for instance lnnlufltl of alphaalninoanthraquinoue a. nployeil in the above example beta-aniim-antl a used: the new dye thns. o

violet vat in which cotton is dyed dart; violet; by exposure to air the dyeing msscs into a fast brown. Furthermore above the new dyes may also be obtained by acting With a bromoanthra(p1inonylanthranilic acid upon for instance alpha-aminoor beta-aminoanthraquinone and by acting upon the condensationproduct thus produced with concentrated sulfuric acid; the treatment with sulfuric acid is preferably performed while heatingf lt= isf also eon venientto state that instead oaths sodium carbonate used in the above exampfi as an acid absorbing agent any other suitable substancejinay be employed. Furthermore for liy means of a .hydrosulfite and an alkali it yields a bluemay be eltls with the copper powder a suitable copper coinponnil 01' anoll'ici' snil'ablc agent possessing a so-callccl ca'lalytic function may be sub SlllHlGLl,

Having now described our invention and the manner in which it may he performed what We claim is.;-

1.. As new articles of manufacture, the new vat dyes of the anthl'aqninone series, heing anlhraqninonylainino iihenantln'aqninoneacridones, and the simplest- !nemhei' of this class of dyes possessing the following constiuitional formula: h

in which formula ll represents ihe rcsnlnc oi? an antlnainiinone GOIHDOUTI'CL which new Eyes yiehl on cotton from an alkaline iii (i170- snllile val: deep brown to i'eihhrown or C-orinih shai hgs which are fast in washing, to ClllOl'lll and to light and these new dyes heing in the (ivy slate when pulverized (lfllli violet lo black powders, which are jaractii-ally insoluble in alcohol. benzene, chlorobenzene glacial acetic dClll and 'pyriclin, and which new dyes dissolve in concentrated sull'nric a (ill to a yellow to green solution.

"3. As; a new vat (lie the antlnraqninonecompound of the Follmving; for

which new clyc in the dry state when pulverized forms a dark 'VlOlCh powder which is; practically insoluble i acetic ac d. pylnlnn but dissolves in in concentrated benzene, chloi'ohenzcne lie-red solution this new sulfuric acnl to a yellow SW 11 alcohol, glacial dlllll mtrobcnzcne to a dye dissolving lntion, from which solution. on the addition of ice violet flakes are separated, and which new colniiioilnll dissolves 3 n fum ng acid of 25% SO to a green solutionthis new (lye producing on cotton without a turns to a Corinth shade which is fast to washing, chlorin and light.

In iestimony whereof we have hereunto set our hands in presence of twosnbscribing witnesses.

\V'ILHELM HERZB ERG.

"W ALT ER Nitnesscs HENRY l'lASPER, l hnynnnan Hum'r.

BRUG K.

sulfuric 

